We discuss the observability of the lightest neutral Higgs boson in the constrained MSSM (CMSSM), with universal soft supersymmetry-breaking parameters, at hadron colliders such as the Tevatron and the LHC. We take account of the constraints on parameter space provided by LEP, the measured rate of b → sγ decay, the cosmological relic density Ωχh , and the recent measurement of gμ − 2. We normal...

We discuss the theory and phenomenology of decays of a leptophobic U(1) X gauge boson X, such as has been proposed to explain the alleged deviations of Rb and Rc from standard model predictions. If the scalars involved in the breaking of the SU(2)×U(1) symmetry are sufficiently light, X will sometimes decay into a charged (or neutral) scalar along with an oppositely-charged W (or Z). These deca...

We study the fragmentation of the b quark in top decay in NLO QCD, within the framework of perturbative fragmentation, which allows one to resum large logarithms ∼ log(m 2 t /m 2 b). We show the b-energy distribution, which we compare with the exact O(α S) result for a massive b quark. We use data from e + e − machines in order to describe the b-quark hadronization and make predictions for the ...

In this paper we study O(2000) (quenched) lattice configurations from the APE collaboration, for different lattice volumes and for 6.0 ≤ β ≤ 6.4 using both the Wilson and the SW-Clover fermion actions. We determine the light hadronic spectrum and meson decay constants and study the mesonic dispersion relation. We extract the hadronic variable J and the strange quark mass in the continuum at the...

In ongoing and upcoming hadron collider experiments, top quark physics will play an important rôle in testing the Standard Model and its possible extensions. In this work we present analytic results for the differential cross sections of top quark pair production in hadronic collisions at next-to-leading order in the QCD coupling, keeping the full dependence on the spins of the top quarks. Thes...

We present results for the mass spectrum and decay constants using non-perturbatively O(a) improved Wilson fermions. Three values of β and 30 different quark masses are used to obtain the chiral and continuum limits. Special emphasis will be given to the question of taking the chiral limit and the existence of non-analytic behavior predicted by quenched chiral perturbation theory (qχP T).

We consider the hadronic description of the B0 d → π+π− decay, with the aim to investigate the strong phases generated by the final state interactions. The derivation of the dispersion relations using the Lehmann-Symanzik-Zimmermann formalism and the Goldberger-Treiman method to include inelastic effects in the spectral function are presented. We discuss the problem of quark-hadron duality and ...

In this paper, we analyze the Standard Model (SM) Higgs boson by computing both partial width and amplitude of a number decay channels that Boson can undergo. our computations, treat as free parameter despite its estimated mass around 125GeV discovered at Large Hadron Collider (LHC).

We report a measurement of the average B-hadron lifetime using data collected with the SLD detector at the SLC in 1993. An inclusive analysis selected three-dimensional vertices with B-hadron lifetime information in a sample of 50k Z0 decays. A lifetime of 1.564±0.030 (stat)±0.037 (syst) ps was extracted from the decay length distribution of these vertices using a binned maximum-likelihood meth...

We present hadron collider production rates for the lightest colorsinglet technihadrons in a simple “straw-man” model of low-scale technicolor. These rates are presented in a way to facilitate their encoding in PYTHIA. This document is a companion to my paper, “Technihadron Production and Decay in Low-Scale Technicolor”. [email protected] 1 1 The Technicolor Straw Man Model In this note we pre...